Method, device, vehicle and storage medium for automatic analysis of a tire envelope

Abstract

The application relates to the technical field of vehicle chassis, in particular to a tire envelope automatic analysis method and device, a vehicle and a storage medium, wherein the method comprises the following steps: establishing a suspension kinematics model of a target tire; acquiring tire envelope working conditions and an analysis step length of the target tire; calling the suspension kinematics model to perform envelope motion simulation on the tire envelope working conditions according to the analysis step length, so as to obtain spatial motion posture data of the tire envelope working conditions; automatically assembling the spatial motion posture data; outputting absolute motion envelope and / or relative motion envelope data of the target tire; and generating an analysis result of the target tire based on the absolute motion envelope and / or the relative motion envelope data. Thus, the problems that the suspension components are insufficient in flexibility due to rigid connection in the related art, the accuracy and efficiency of the tire envelope analysis result are low, the aesthetic degree is poor, and the current technical requirements cannot be met are solved.

Description

Technical Field

[0001] This invention relates to the field of vehicle chassis technology, and more specifically to an automatic analysis method, apparatus, vehicle, and storage medium for tire envelope. Background Technology

[0002] Tire envelope is used to simulate the space occupied by a vehicle tire under various extreme coupling conditions. This ensures that there is sufficient clearance between the tire and the chassis and body components, so that even if the performance of the components deteriorates normally as the vehicle's service life and mileage increase, there will be no interference. Therefore, the accuracy and efficiency of tire envelope analysis results are crucial.

[0003] In related technologies, tire envelope analysis is mostly performed through motion simulation using 3D software. The suspension components are rigidly connected, ignoring the influence of nonlinear flexible deformation of various vehicle components under the coupling of the entire system. This cannot accurately simulate the tire envelope surface, which may cause interference problems in the later stages of actual vehicle development, leading to quality issues. Moreover, for this multi-software joint analysis method, the data transfer, data post-processing, working condition creation, model and parameter identification between software still require a lot of human intervention, resulting in low efficiency and a high possibility of data transfer errors. It cannot fully adapt to the fast-paced and iterative development process of projects under the current intense competition among car manufacturers. Summary of the Invention

[0004] One objective of this invention is to provide an automatic tire envelope analysis method to address the shortcomings of existing technologies, such as insufficient flexibility due to rigid connections in suspension components and low accuracy, inefficiency, and poor aesthetics in generating tire envelope analysis results through multi-software joint analysis, which fail to meet current technical requirements. A second objective is to provide an automatic tire envelope analysis device. A third objective is to provide a vehicle. A fourth objective is to provide a computer-readable storage medium.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] An automatic analysis method for tire envelope includes: establishing a suspension kinematic model of a target tire; acquiring the tire envelope working condition and analysis step size of the target tire; calling the suspension kinematic model to perform envelope motion simulation on the tire envelope working condition according to the analysis step size to obtain spatial motion attitude data of the tire envelope working condition; automatically assembling the spatial motion attitude data; outputting the absolute motion envelope and / or relative motion envelope data of the target tire; and generating the analysis result of the target tire based on the absolute motion envelope and / or the relative motion envelope data.

[0007] Based on the aforementioned technical means, this application can perform envelope motion simulation based on the suspension kinematic model to obtain spatial motion posture data. By adopting a controllable working condition step size method, the number of tire envelope frames can be selectively controlled, making the automatically generated envelope fuller, smoother, and more aesthetically pleasing. Through automatic assembly of spatial motion posture data, it can achieve fully automatic one-click completion with extremely high efficiency. No manual operation is required in the intermediate process, avoiding the error rate of manual data processing and ensuring high accuracy of analysis. At the same time, it meets the requirements of rapid and iterative design in the early stage of R&D projects. By outputting one or more of the absolute motion envelope and relative motion envelope of the tire, it is beneficial for engineers to evaluate the design rationality of the tire interference clearance from different perspectives.

[0008] Furthermore, establishing the suspension kinematic model for the target tire includes: simulating the torsional bending deformation of the vehicle body under preset working conditions to obtain the linear stiffness and torsional stiffness of the vehicle body; flexibly processing the moving parts of the chassis, and connecting the vehicle body and the suspension according to the linear stiffness and the torsional stiffness to establish a rigid-flexible coupling suspension dynamic model; iteratively adjusting the parameters of the rigid-flexible coupling suspension dynamic model until the target characteristics of the rigid-flexible coupling suspension dynamic model meet the preset accuracy conditions, thus obtaining the final suspension kinematic model.

[0009] Based on the above technical means, this application can establish a rigid-flexible coupling suspension dynamic model by flexibly processing the moving parts of the chassis, and obtain the suspension kinematic model by iteratively adjusting the parameters of the rigid-flexible coupling suspension dynamic model, thereby effectively improving the high accuracy of the tire envelope analysis results of the suspension under various extreme coupling conditions.

[0010] Furthermore, the target features include suspension K-characteristics and suspension C-characteristics, wherein the preset accuracy condition for the suspension K-characteristics includes the suspension K-characteristics being greater than a first preset accuracy, and the preset accuracy condition for the suspension C-characteristics includes the suspension C-characteristics being greater than a second preset accuracy.

[0011] Furthermore, the parameters of the rigid-flexible coupling suspension dynamic model are iteratively adjusted, including: iteratively testing the rigid-flexible coupling suspension dynamic model under the same working conditions; adjusting one or more parameters of the rigid-flexible coupling suspension dynamic model, such as axle load, four-wheel alignment, tires, and bushings, according to the results of each iterative test, wherein the results of each iterative test include the actual test curves and simulation analysis curves of the rigid-flexible coupling suspension dynamic model under the same working conditions.

[0012] Based on the above technical means, this application can perform iterative tests on the rigid-flexible coupling suspension dynamics model under the same working condition, and adjust the parameters according to the iterative test results, which can effectively improve the high accuracy of the tire envelope analysis results of the rigid-flexible coupling suspension dynamics model under various extreme coupling working conditions.

[0013] Furthermore, after establishing the suspension kinematic model of the target tire, the process also includes: creating a spatial motion attitude measurement task for the moving parts of the chassis relative to the origin coordinates; and measuring the spatial motion attitude change data of the wheel under various coupling conditions based on the spatial motion attitude measurement task.

[0014] Based on the above-mentioned technical means, this application can measure the spatial motion attitude change data of the wheel under various coupled working conditions based on the spatial motion attitude measurement task, thereby providing data support for subsequent automatic analysis of tire envelope.

[0015] Furthermore, obtaining the tire envelope condition and analysis step size of the target tire includes: obtaining the specification requirements of the tire envelope analysis condition; writing the specification requirements into the bottom layer of the delivery interface; generating the tire envelope condition according to the design parameters input into the delivery interface; and calculating the analysis step size of the tire envelope condition according to the set number of envelope frames.

[0016] Based on the above technical means, this application can obtain the analysis step size of the tire envelope working condition based on the specification requirements of the tire envelope analysis working condition, thereby preparing for the subsequent adoption of a working condition step size controllable method.

[0017] Furthermore, the automatic assembly of the spatial motion posture data includes: importing the spatial motion posture data into a template file; and performing coordinate transformation on the spatial motion posture data in the template file to achieve automatic assembly of the spatial motion posture data.

[0018] Based on the above technical means, this application can automatically assemble spatial motion posture data by performing coordinate transformation on the spatial motion posture data in the template file, thereby ensuring the automatic generation of tire envelope analysis and improving efficiency.

[0019] An automatic tire envelope analysis device includes: a modeling module for modeling a suspension kinematics model of a target tire; an acquisition module for acquiring the tire envelope condition and analysis step size of the target tire, calling the suspension kinematics model to perform envelope motion simulation on the tire envelope condition according to the analysis step size, and obtaining spatial motion attitude data of the tire envelope condition; and a generation module for automatically assembling the spatial motion attitude data, outputting the absolute motion envelope and / or relative motion envelope data of the target tire, and generating the analysis result of the target tire based on the absolute motion envelope and / or the relative motion envelope data.

[0020] Furthermore, the establishment module is further used to: simulate the torsional bending deformation of the vehicle body under preset working conditions to obtain the linear stiffness and torsional stiffness of the vehicle body; perform flexible processing on the moving parts of the chassis, and connect the vehicle body and the suspension according to the linear stiffness and the torsional stiffness to establish a rigid-flexible coupling suspension dynamic model; perform iterative adjustment of the parameters of the rigid-flexible coupling suspension dynamic model until the target features of the rigid-flexible coupling suspension dynamic model meet the preset accuracy conditions, and obtain the final suspension kinematic model.

[0021] Furthermore, the establishment module can also be used to: perform iterative testing on the rigid-flexible coupling suspension dynamic model under the same working conditions; adjust one or more parameters of the rigid-flexible coupling suspension dynamic model, such as axle load, four-wheel alignment, tires, and bushings, according to the results of each iterative test, wherein the results of each iterative test include the actual test curves and simulation analysis curves of the rigid-flexible coupling suspension dynamic model under the same working conditions.

[0022] Furthermore, the automatic tire envelope analysis device also includes: a measurement module, used to create a spatial motion attitude measurement task of the chassis moving parts relative to the origin coordinates after establishing the suspension kinematic model of the target tire; and to measure the spatial motion attitude change data of the wheel under various coupling conditions according to the spatial motion attitude measurement task.

[0023] Furthermore, the acquisition module is further used to: acquire the specification requirements of the tire envelope analysis condition; write the specification requirements into the bottom layer of the delivery interface; generate the tire envelope condition according to the design parameters input into the delivery interface; and calculate the analysis step size of the tire envelope condition according to the set number of envelope frames.

[0024] Furthermore, the generation module is further used to: import the spatial motion posture data into a template file; and perform coordinate transformation on the spatial motion posture data in the template file to achieve automatic assembly of the spatial motion posture data.

[0025] A vehicle includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, the processor executing the program to implement the above-described automatic tire envelope analysis method.

[0026] A computer-readable storage medium having a computer program stored thereon, which is executed by a processor to implement the above-described automatic tire envelope analysis method.

[0027] The beneficial effects of this invention are:

[0028] 1. This application can perform envelope motion simulation based on the suspension kinematic model to obtain spatial motion attitude data. By adopting a controllable working condition step size method, the number of tire envelope frames can be selectively controlled, making the automatically generated envelope fuller, smoother, and more aesthetically pleasing. By automatically assembling spatial motion attitude data, it can achieve fully automatic one-click completion with extremely high efficiency. No manual operation is required in the intermediate process, avoiding the error rate of manual data processing and ensuring high accuracy of analysis. At the same time, it meets the requirements of rapid and iterative design in the early stage of R&D projects. By outputting one or more of the absolute motion envelope and relative motion envelope of the tire, it is beneficial for engineers to evaluate the design rationality of the tire interference clearance from different perspectives.

[0029] 2. This application can establish a rigid-flexible coupling suspension dynamic model by making the moving parts of the chassis more flexible, and obtain the suspension kinematic model by iteratively adjusting the parameters of the rigid-flexible coupling suspension dynamic model, thereby effectively improving the accuracy of the tire envelope analysis results of the suspension under various extreme coupling conditions.

[0030] 3. This application can perform iterative tests on the rigid-flexible coupling suspension dynamic model under the same working condition, and adjust the parameters according to the iterative test results, which can effectively improve the high accuracy of the tire envelope analysis results of the rigid-flexible coupling suspension dynamic model under various extreme coupling working conditions.

[0031] 4. This application can measure the spatial motion attitude change data of the wheel under various coupled working conditions based on the spatial motion attitude measurement task, thereby providing data support for subsequent automatic analysis of tire envelope.

[0032] 5. This application can obtain the analysis step size of the tire envelope working condition based on the specification requirements of the tire envelope analysis working condition, thereby preparing for the subsequent adoption of a working condition step size controllable method.

[0033] 6. This application can automatically assemble spatial motion attitude data by performing coordinate transformation on the spatial motion attitude data in the template file, thereby ensuring the automatic generation of tire envelope analysis and improving efficiency.

[0034] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0035] Figure 1 This is a flowchart illustrating the automatic tire envelope analysis method provided according to an embodiment of this application;

[0036] Figure 2 This is a flowchart of a fully automated tire envelope analysis method provided according to an embodiment of this application;

[0037] Figure 3 This is a schematic diagram of the flexible mesh for chassis sheet metal parts provided according to an embodiment of this application;

[0038] Figure 4 This is a case illustration of a high-precision suspension kinematic model provided according to an embodiment of this application;

[0039] Figure 5 This is a partial illustration of the tire envelope working condition provided according to an embodiment of this application;

[0040] Figure 6 This is a diagram of the fully automated envelope analysis interactive interface provided according to an embodiment of this application;

[0041] Figure 7 This is a diagram illustrating the automatically generated absolute motion envelope of a tire according to an embodiment of this application.

[0042] Figure 8 This is an automatically generated diagram illustrating the relative motion envelope of a tire according to an embodiment of this application.

[0043] Figure 9 This is a schematic diagram of an automatic tire envelope analysis device provided according to an embodiment of this application;

[0044] Figure 10 This is a schematic diagram of a vehicle provided according to an embodiment of this application. Detailed Implementation

[0045] The embodiments of the present invention will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention and not for limiting the scope of protection of the present invention.

[0046] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0047] The following describes a fully automated tire envelope analysis method, device, vehicle, and storage medium proposed in this application. This method establishes a high-precision suspension kinematic model and the required spatial motion attitude measurement of chassis components relative to the origin coordinates through methods such as vehicle body torsional bending stiffness simulation, chassis sheet metal flexibility, and iterative KC calibration of the suspension. Then, modular functions are implemented using CMD, MATLAB, and Python languages ​​to drive fully automated data generation, processing, transmission, and execution between Adams and CATIA software, achieving fully automated completion of tire relative and absolute motion envelope analysis. Therefore, compared to traditional tire envelope analysis methods, the method proposed in this application offers higher efficiency, higher precision, lower error rates, and a smoother, more aesthetically pleasing envelope surface. It meets the rapid iterative design requirements of early-stage R&D projects, is customizable, highly portable, and can be widely adopted.

[0048] Specifically, Figure 1 This is a flowchart illustrating an automatic tire envelope analysis method provided in an embodiment of this application.

[0049] like Figure 1 As shown, the automatic analysis method for tire envelope includes the following steps:

[0050] In step S101, a suspension kinematic model of the target tire is established.

[0051] Specifically, establishing a suspension kinematic model for the target tire includes: simulating the torsional bending deformation of the vehicle body under preset working conditions to obtain the linear stiffness and torsional stiffness of the vehicle body; flexibly processing the moving parts of the chassis, and connecting the vehicle body and suspension based on the linear stiffness and torsional stiffness to establish a rigid-flexible coupling suspension dynamic model; iteratively adjusting the parameters of the rigid-flexible coupling suspension dynamic model until the target characteristics of the rigid-flexible coupling suspension dynamic model meet the preset accuracy conditions, thus obtaining the final suspension kinematic model.

[0052] The target features of the rigid-flexible coupling suspension dynamics model include suspension K-characteristics and suspension C-characteristics. The parameters can be iteratively adjusted based on the suspension KC test result curves and the simulation analysis curves under the same working conditions of the model until the preset accuracy conditions are met. The preset accuracy conditions for suspension K-characteristics include that the suspension K-characteristics are greater than the first preset accuracy, and the preset accuracy conditions for suspension C-characteristics include that the suspension C-characteristics are greater than the second preset accuracy. The preset accuracy can be determined according to the actual situation, such as 90% accuracy, 70% accuracy, etc., without specific limitations.

[0053] It is understood that the embodiments of this application can establish a rigid-flexible coupling suspension dynamic model by making the moving parts of the chassis more flexible, and obtain the suspension kinematic model by iteratively adjusting the parameters of the rigid-flexible coupling suspension dynamic model, thereby effectively improving the accuracy of the tire envelope analysis results of the suspension under various extreme coupling conditions.

[0054] Specifically, this application embodiment simulates the torsional bending deformation of the vehicle body under extreme working conditions by using bushings and performs flexible treatment on the sheet metal parts of the chassis that are the main moving parts. By comparing with the suspension KC test results, the performance component parameters are adjusted appropriately through repeated iterations, thereby completing the establishment of a high-precision suspension kinematic model.

[0055] Furthermore, in one embodiment of this application, the parameter iterative adjustment of the rigid-flexible coupling suspension dynamic model includes: performing iterative tests on the rigid-flexible coupling suspension dynamic model under the same working conditions; adjusting one or more parameters of the rigid-flexible coupling suspension dynamic model, such as axle load, four-wheel alignment, tires, and bushings, according to the results of each iterative test, wherein the results of each iterative test include the actual test curve and simulation analysis curve of the rigid-flexible coupling suspension dynamic model under the same working conditions.

[0056] It is understood that the embodiments of this application can perform iterative tests on the rigid-flexible coupling suspension dynamics model under the same working conditions, and adjust the parameters according to the iterative test results, which can effectively improve the high accuracy of the tire envelope analysis results of the rigid-flexible coupling suspension dynamics model under various extreme coupling working conditions.

[0057] Furthermore, in one embodiment of this application, after establishing the suspension kinematic model of the target tire, the method further includes: creating a spatial motion attitude measurement task for the moving parts of the chassis relative to the origin coordinates; and measuring the spatial motion attitude change data of the wheel under various coupling conditions according to the spatial motion attitude measurement task.

[0058] It is understood that the embodiments of this application can measure the changes in the spatial motion attitude of the wheel under various coupled conditions based on the spatial motion attitude measurement task, thereby providing data support for subsequent automatic analysis of the tire envelope.

[0059] Specifically, the embodiments of this application can create spatial motion attitude measurement requirements for chassis moving parts relative to the origin coordinates, mainly including spatial displacement changes in the three directions of X, Y, and Z, and spatial angle changes in the three directions of tilt, pitch, and roll.

[0060] In step S102, the tire envelope condition and analysis step length of the target tire are obtained, and the suspension kinematics model is called to perform envelope motion simulation on the tire envelope condition according to the analysis step length to obtain the spatial motion attitude data of the tire envelope condition.

[0061] It is understood that the embodiments of this application can perform envelope motion simulation on the tire envelope working condition based on the suspension kinematic model and analysis step size, thereby obtaining spatial motion posture data, providing a prerequisite for subsequent automatic assembly. By adopting a working condition step size controllable method, the number of tire envelope frames can be selectively controlled, making the automatically generated envelope fuller, smoother and more beautiful.

[0062] Specifically, the embodiments of this application can automatically create tire envelope conditions using the CMD language, automatically identify the front and rear suspension types, whether anti-skid chains are used, and the number of tire envelope frames, and complete fully automated simulation analysis based on the conditions, and then automatically output the spatial motion posture data of tires and other components.

[0063] Furthermore, in one embodiment of this application, obtaining the tire envelope condition and analysis step size of the target tire includes: obtaining the specification requirements of the tire envelope analysis condition; writing the specification requirements into the bottom layer of the delivery interface; generating the tire envelope condition according to the design parameters input into the delivery interface; and calculating the analysis step size of the tire envelope condition according to the set number of envelope frames.

[0064] It is understood that the embodiments of this application can obtain the analysis step size of the tire envelope working condition based on the specification requirements of the tire envelope analysis working condition, thereby preparing for the subsequent adoption of a working condition step size controllable method.

[0065] In step S103, the spatial motion attitude data is automatically assembled, and the absolute motion envelope and / or relative motion envelope data of the target tire are output. Based on the absolute motion envelope and / or relative motion envelope data, the analysis results of the target tire are generated.

[0066] It is understood that the embodiments of this application can achieve fully automatic one-click completion by automatically assembling spatial motion posture data, which is extremely efficient. No human operation is required in the intermediate process, avoiding the error rate of human data processing, ensuring high accuracy of analysis, and meeting the requirements of rapid and iterative design in the early stage of R&D projects. By outputting one or more of the absolute motion envelope and relative motion envelope of the tire, it is beneficial for engineers to evaluate the design rationality of the tire interference gap from different perspectives.

[0067] Specifically, in this embodiment, the CMD language automatically drives a modular MATLAB program implemented in M ​​language to automatically process the spatial motion posture data of tires and other components, and writes it into a specified Excel template for tire envelope analysis. The CMD language automatically drives a Python modular program to execute the data in the Excel template into CATIA. The automatic assembly of the spatial motion posture of tires and other components is completed through coordinate transformation, and the absolute motion envelope and relative motion envelope data of the tire in 3D XML format are output. Finally, the tire envelope interference gap analysis is performed in CATIA.

[0068] Furthermore, in one embodiment of this application, the automatic assembly of spatial motion posture data includes: importing spatial motion posture data into a template file; and performing coordinate transformation on the spatial motion posture data in the template file to achieve automatic assembly of the spatial motion posture data.

[0069] It is understood that the embodiments of this application can automatically assemble spatial motion posture data by performing coordinate transformation on the spatial motion posture data in the template file, thereby ensuring the automatic generation of tire envelope analysis and improving efficiency.

[0070] The automatic tire envelope analysis method proposed in this application can perform envelope motion simulation based on the suspension kinematic model to obtain spatial motion posture data. By adopting a controllable working condition step size method, the number of tire envelope frames can be selectively controlled, making the automatically generated envelope fuller, smoother, and more aesthetically pleasing. By automatically assembling the spatial motion posture data, it can achieve fully automatic one-click completion with extremely high efficiency. No manual operation is required in the intermediate process, avoiding the error rate of manual data processing and ensuring high accuracy of analysis. At the same time, it meets the requirements of rapid and iterative design in the early stage of R&D projects. By outputting one or more of the absolute motion envelope and relative motion envelope of the tire, it is beneficial for engineers to evaluate the design rationality of the tire interference clearance from different perspectives.

[0071] To better understand the specific implementation process of the embodiments of this application, the following is combined with... Figure 2 To elaborate in detail, such as Figure 2 As shown, it includes the following steps:

[0072] Step S1: Establish a high-precision suspension kinematic model, such as... Figure 3 and Figure 4 As shown, it specifically includes:

[0073] (1) In Adams / car, the body bushing model position is established using the center points of the left and right front pillars, left and right rear springs and the four body mounting points. This position is connected to the center of gravity of the whole vehicle by the bushing. The stiffness of the bushing in the X, Y and Z directions and the torsional stiffness are input by finite element analysis stiffness input or early stage of vehicle performance target input. This position is fixedly connected to the points on the left and right rear springs, so as to simulate the influence of the slight changes in the body body and its attitude under coupled conditions such as extreme compression, extreme tension, extreme steering, maximum braking and maximum acceleration on the tire envelope accuracy.

[0074] (2) The sheet metal parts of the main moving components of the chassis are made more flexible. Hypermesh software is used to create a mesh for the subframe, control arms, and lower shock absorber brackets, with a mesh size of 3mm. Figure 3The subframe mesh shown is connected with weld points and weld seams, and material properties are assigned. The modal neutral file of the sheet metal parts is calculated to obtain flexibility data and import it into adams / car. The node numbers of the connection positions are defined, the suspension kinematic model is established, and then the model is adjusted according to the elastic component test data, axle load, four-wheel alignment and other parameters.

[0075] (3) Figure 3 and Figure 4 As shown, based on the comparison of the KC test result curve of the suspension with the simulation analysis curve of the same working condition, and based on experience, the suspension K characteristic is made to meet certain accuracy requirements, such as 90%, and the C characteristic is made to meet certain accuracy requirements, such as 70%, by repeatedly iterating and fine-tuning parameters such as bushings, so that the high-precision suspension kinematic model is established.

[0076] (4) Create spatial motion attitude measurement requirements for chassis moving parts relative to the origin coordinates through the request function of the adams / car module, including spatial displacement changes in the X, Y, and Z directions and spatial angle changes in the roll, pitch, and roll directions, to measure the spatial motion attitude changes of the wheel under various extreme coupling conditions.

[0077] Step S2: Automatically create tire envelope conditions and analyze step size control, such as... Figure 5 As shown, Figure 5 To meet the requirements of the tire envelope analysis working condition specifications, the working condition requirements can be implemented at the low level based on Adams' CMD language and connected to the delivery interface. Then, the design parameters of the corresponding suspension are input, and a reasonable number of envelope frames is set in Number. The larger the number of frames, the smoother and fuller the final tire envelope surface will be, but the longer the calculation time will be. Based on the suspension type and whether anti-skid chains are required, the working condition is automatically identified and *.lcf format tire envelope working condition files are created in the model library working condition folder.

[0078] Step S3: Automatically execute tire envelope simulation. The cmd language automatically drives the model to execute the *.lcf format working conditions generated in S2 to perform tire envelope simulation analysis.

[0079] Step S4: Automatically export the attitude data of tires and other components to a template file. The cmd language automatically drives the modular MATLAB-based program tire_envelope_data_FS.exe to process the spatial displacement changes in the X, Y, and Z directions and the spatial angle changes in the roll, pitch, and roll directions of tires and other components under various extreme motion conditions, and automatically writes them to the corresponding positions in the tire_envelope_data.xlsx Excel template. The working path and tire model file in tire_envelope_data.xlsx need to be set in advance.

[0080] Step S5: The template program package is automatically called to assemble the tire posture. The cmd language automatically drives the Python modular program tire_envelope.exe to execute the data in the tire_envelope_data.xlsx template into CATIA, and completes the automatic assembly of the spatial motion posture of the tire and other components through coordinate transformation.

[0081] Step S6: The above steps can be completed by clicking as shown. Figure 6 The Analysis function in the interactive interface shown can automatically output results such as... Figure 7 The tire's absolute motion envelope (an integrated assembly of all spatial motion postures of the tire during wheel movement) and as shown... Figure 8 The data shown is the relative motion envelope of the tire (when the wheel moves, if the tire is taken as a reference and remains stationary, the spatial motion posture of other components relative to the wheel assembly). Finally, the design rationality of the tire interference clearance is evaluated from different angles, and the existence of interference between the tire and the components is checked.

[0082] In summary, the embodiments of this application can achieve fully automated one-click completion of tire envelope analysis by establishing a nonlinear high-precision suspension kinematic model that satisfies tire envelope analysis. This is highly efficient, requires no manual operation in the intermediate process, avoids the error rate of manual data processing, and ensures high accuracy of analysis. At the same time, it meets the requirements of rapid and iterative design in the early stage of R&D projects. Furthermore, the fully automated tire envelope analysis method, device, and storage medium of the embodiments of this application are customizable, highly portable, and can be widely used. In addition, since different products have different performance positioning, different suspension types, and their design stroke and maximum steering angle are different, unlike the prior art, the embodiments of this application adopt a controllable working condition step method to achieve selective control of the number of tire envelope frames, making the automatically generated envelope fuller, smoother, and more aesthetically pleasing. At the same time, the output of the absolute motion envelope and relative motion envelope of the tire makes it easy for engineers to evaluate the design rationality of the tire interference clearance from different perspectives.

[0083] Next, with reference to the accompanying drawings, an automatic tire envelope analysis device according to an embodiment of this application is described.

[0084] Figure 9 This is a block diagram of an automatic tire envelope analysis device according to an embodiment of this application.

[0085] like Figure 9 As shown, the automatic tire envelope analysis device 10 includes: a creation module 100, an acquisition module 200, and a generation module 300.

[0086] The system comprises: a setup module 100 for establishing a suspension kinematic model of the target tire; an acquisition module 200 for acquiring the tire envelope condition and analysis step size of the target tire, calling the suspension kinematic model to perform envelope motion simulation on the tire envelope condition according to the analysis step size, and obtaining spatial motion attitude data of the tire envelope condition; and a generation module 300 for automatically assembling the spatial motion attitude data, outputting the absolute motion envelope and / or relative motion envelope data of the target tire, and generating the analysis results of the target tire based on the absolute motion envelope and / or relative motion envelope data.

[0087] Furthermore, in one embodiment of this application, the establishment module 100 is further used to: simulate the torsional bending deformation of the vehicle body under preset working conditions to obtain the linear stiffness and torsional stiffness of the vehicle body; perform flexible processing on the moving parts of the chassis, and connect the vehicle body and the suspension according to the linear stiffness and torsional stiffness to establish a rigid-flexible coupling suspension dynamic model; perform iterative adjustment of the parameters of the rigid-flexible coupling suspension dynamic model until the target features of the rigid-flexible coupling suspension dynamic model meet the preset accuracy conditions, and obtain the final suspension kinematic model.

[0088] Furthermore, in one embodiment of this application, the establishment module 100 can also be used to: perform iterative testing on the rigid-flexible coupling suspension dynamic model under the same working conditions; adjust one or more parameters of the axle load, four-wheel alignment, tires and bushings of the rigid-flexible coupling suspension dynamic model according to the results of each iterative test, wherein the results of each iterative test include the actual test curve and simulation analysis curve of the rigid-flexible coupling suspension dynamic model under the same working conditions.

[0089] Furthermore, in one embodiment of this application, the automatic tire envelope analysis device 10 further includes: a measurement module, used to create a spatial motion attitude measurement task of the chassis moving parts relative to the origin coordinates after establishing the suspension kinematic model of the target tire; and to measure the spatial motion attitude change data of the wheel under various coupling conditions according to the spatial motion attitude measurement task.

[0090] Furthermore, in one embodiment of this application, the acquisition module 200 is further used to: acquire the specification requirements of the tire envelope analysis condition; write the specification requirements into the bottom layer of the delivery interface; generate the tire envelope condition according to the design parameters input into the delivery interface; and calculate the analysis step size of the tire envelope condition according to the set number of envelope frames.

[0091] Furthermore, in one embodiment of this application, the generation module 300 is further configured to: import spatial motion posture data into a template file; and perform coordinate transformation on the spatial motion posture data in the template file to achieve automatic assembly of the spatial motion posture data.

[0092] It should be noted that the explanation of the above-described embodiment of the automatic tire envelope analysis method also applies to the automatic tire envelope analysis device of this embodiment, and will not be repeated here.

[0093] The automatic tire envelope analysis device proposed in this application can perform envelope motion simulation based on the suspension kinematic model to obtain spatial motion posture data. By adopting a controllable working condition step size method, the number of tire envelope frames can be selectively controlled, making the automatically generated envelope fuller, smoother, and more aesthetically pleasing. By automatically assembling spatial motion posture data, it can achieve fully automatic one-click completion with extremely high efficiency. No manual operation is required in the intermediate process, avoiding the error rate of manual data processing and ensuring high accuracy of analysis. At the same time, it meets the requirements of rapid and iterative design in the early stage of R&D projects. By outputting one or more of the absolute motion envelope and relative motion envelope of the tire, it is beneficial for engineers to evaluate the design rationality of the tire interference gap from different perspectives.

[0094] Figure 10 A schematic diagram of the structure of a vehicle provided in an embodiment of this application. The vehicle may include:

[0095] The memory 1001, the processor 1002, and the computer program stored on the memory 1001 and capable of running on the processor 1002.

[0096] When the processor 1002 executes the program, it implements the automatic tire envelope analysis method provided in the above embodiments.

[0097] Furthermore, the vehicle also includes:

[0098] Communication interface 1003 is used for communication between memory 1001 and processor 1002.

[0099] The memory 1001 is used to store computer programs that can run on the processor 1002.

[0100] The memory 1001 may include high-speed RAM (Random Access Memory) memory, and may also include non-volatile memory, such as at least one disk storage.

[0101] If the memory 1001, processor 1002, and communication interface 1003 are implemented independently, then the communication interface 1003, memory 1001, and processor 1002 can be interconnected via a bus to complete communication between them. The bus can be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus, or an EISA (Extended Industry Standard Architecture) bus, etc. The bus can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 10 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0102] Optionally, in a specific implementation, if the memory 1001, processor 1002, and communication interface 1003 are integrated on a single chip, then the memory 1001, processor 1002, and communication interface 1003 can communicate with each other through an internal interface.

[0103] The processor 1002 may be a CPU (Central Processing Unit), an ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement the embodiments of this application.

[0104] This application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described automatic tire envelope analysis method.

[0105] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0106] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0107] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or N executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of this application pertain.

[0108] It should be understood that the various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (FPGAs), field-programmable gate arrays (FPGAs), etc.

[0109] Those skilled in the art will understand that all or part of the steps of the methods described in the above embodiments can be implemented by a program instructing related hardware, and the program can be stored in a computer-readable storage medium. When executed, the program includes one or a combination of the steps of the method embodiments.

[0110] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. An automatic analysis method for tire envelope, characterized in that, Includes the following steps: Establish a suspension kinematic model for the target tire; The tire envelope condition and analysis step size of the target tire are obtained. The suspension kinematics model is called to perform envelope motion simulation on the tire envelope condition according to the analysis step size to obtain the spatial motion attitude data of the tire envelope condition. The system automatically assembles the spatial motion attitude data, outputs the absolute motion envelope and / or relative motion envelope data of the target tire, and generates the analysis results of the target tire based on the absolute motion envelope and / or the relative motion envelope data. The establishment of the suspension kinematic model for the target tire includes: The linear stiffness and torsional stiffness of the vehicle body are obtained by simulating the torsional bending deformation of the vehicle body under preset working conditions. The moving parts of the chassis are made more flexible, and the body and suspension are connected according to the linear stiffness and the torsional stiffness to establish a rigid-flexible coupling suspension dynamic model. The parameters of the rigid-flexible coupling suspension dynamics model are iteratively adjusted until the target characteristics of the rigid-flexible coupling suspension dynamics model meet the preset accuracy conditions, thus obtaining the final suspension kinematics model. The target features include suspension K-characteristics and suspension C-characteristics, wherein the preset accuracy condition for the suspension K-characteristics includes that the suspension K-characteristics is greater than a first preset accuracy, and the preset accuracy condition for the suspension C-characteristics includes that the suspension C-characteristics is greater than a second preset accuracy.

2. The automatic analysis method for tire envelope according to claim 1, characterized in that, The parameters of the rigid-flexible coupling suspension dynamics model are iteratively adjusted, including: The rigid-flexible coupling suspension dynamics model was iteratively tested under the same working conditions. Based on the test results of each iteration, adjust one or more parameters of the rigid-flexible coupling suspension dynamics model, including axle load, four-wheel alignment, tires, and bushings. The test results of each iteration include the actual test curves and simulation analysis curves of the rigid-flexible coupling suspension dynamics model under the same working conditions.

3. The automatic analysis method for tire envelope according to claim 1, characterized in that, After establishing the suspension kinematic model for the target tire, the following steps are also included: The task involves creating a spatial motion attitude measurement system for the moving components of the chassis relative to the origin coordinates. The spatial motion attitude measurement task measures the changes in the spatial motion attitude of the wheel under various coupling conditions.

4. The automatic analysis method for tire envelope according to claim 1, characterized in that, The process of obtaining the tire envelope condition and analysis step size of the target tire includes: Obtain the standard requirements for tire envelope analysis operating conditions; The specified requirements are written into the bottom layer of the delivery interface. The tire envelope condition is generated according to the design parameters input into the delivery interface, and the analysis step size of the tire envelope condition is calculated according to the set number of envelope frames.

5. The automatic analysis method for tire envelope according to claim 1, characterized in that, The automatic assembly of the spatial motion posture data includes: Import the spatial motion posture data into the template file; The spatial motion posture data in the template file is subjected to coordinate transformation to achieve automatic assembly of the spatial motion posture data.

6. An automatic analysis device for tire envelope, characterized in that, The apparatus is used to perform the automatic analysis method for tire envelope as described in any one of claims 1-5, comprising: A module is created to build the suspension kinematics model of the target tire; The acquisition module is used to acquire the tire envelope condition and analysis step size of the target tire, call the suspension kinematics model to perform envelope motion simulation on the tire envelope condition according to the analysis step size, and obtain the spatial motion attitude data of the tire envelope condition. The generation module is used to automatically assemble the spatial motion attitude data, output the absolute motion envelope and / or relative motion envelope data of the target tire, and generate the analysis results of the target tire based on the absolute motion envelope and / or the relative motion envelope data.

7. A vehicle, characterized in that, include: A memory, a processor, and a computer program stored in the memory and executable on the processor, the processor executing the program to implement the automatic analysis method for tire envelope as described in any one of claims 1-5.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that, The program is executed by the processor to implement the automatic analysis method for tire envelope as described in any one of claims 1-5.

Images